Power Transformers Built for Grid Reliability and Heavy-Duty Performance
From standard transmission applications to ultra-high voltage and special transformer projects, our portfolio combines dependable engineering, low operating loss and export-ready execution for utility, industrial and critical infrastructure customers.
Power Transformers
Designed for utility, industrial and critical infrastructure projects, our power transformers combine long-term reliability, low operating loss and minimal maintenance requirements.
Reliable, Efficient and Low-Maintenance Performance
Our power transformers are designed with high reliability, low loss, low noise, low partial discharge and low temperature rise—ensuring long service life with minimal maintenance requirements.
High Reliability
Engineered for stable and long-term operation under demanding grid and industrial conditions.
Low Loss
Optimised electromagnetic and structural design helps reduce energy loss and improve efficiency.
Low Noise
Advanced core and winding design ensures quieter performance in substation and urban environments.
Low Partial Discharge
Enhanced insulation system supports strong electrical performance, service life and operational safety.
Low Temperature Rise
Efficient cooling and thermal management maintain safe operating temperatures under heavy load.
Maintenance-Free Design
Built to minimise maintenance requirements and lower lifecycle operating costs for end users.
Power Transformer Solutions by Voltage Level
A complete power transformer portfolio covering special applications and major voltage classes from 66kV to 500kV, with each category supported by project-proven designs and export experience.
Special Transformers
Customised rectifier transformers, testing transformers and other special solutions for dedicated industrial and power system applications.
66kV Power Transformer
Reliable medium-voltage transformers for regional distribution networks and industrial power systems.
110kV Power Transformer
Widely used in substations and transmission applications with stable performance and proven operating reliability.
220kV Power Transformer
High-capacity transformers for large-scale power transmission and utility-grade substation projects.
330kV Power Transformer
Advanced transmission solutions developed for high-load grid infrastructure and critical network capacity expansion.
400kV Power Transformer
Generator transformers designed for large-scale power generation projects and demanding combined-cycle installations.
500kV Power Transformer
Ultra-high voltage transformer capability for national grid projects, strategic transmission infrastructure and critical energy systems.
Types & Specifications of Power Transformers
A structured range covering double-winding, three-winding and autotransformer configurations, available with on-load and off-load tap changer options across 35kV to 500kV classes.
Product Types & Technical Range
The following table summarises the main model families, voltage classes and configuration types available in our power transformer portfolio.
| No. | Model (Capacity) | Description | Voltage | Phase |
|---|---|---|---|---|
| 1 | S(FZ11)-630–135000/35–38.5 | 35kV Double-winding On-load Tap Changer Power Transformer Series | 35kV | 3 Phase |
| 2 | S(F11)-630–120000/35–38.5 | 35kV Double-winding Off-load Tap Changer Power Transformer Series | 35kV | 3 Phase |
| 3 | S(FZ11)-630–95000/63–69 | 66kV Double-winding On-load Tap Changer Power Transformer Series | 66kV | 3 Phase |
| 4 | S(F11)-630–95000/63–69 | 66kV Double-winding Off-load Tap Changer Power Transformer Series | 66kV | 3 Phase |
| 5 | S(FZ11)-630–180000/110 | 110kV Double-winding On-load Tap Changer Power Transformer Series | 110kV | 3 Phase |
| 6 | S(F11)-630–180000/110 | 110kV Double-winding Off-load Tap Changer Power Transformer Series | 110kV | 3 Phase |
| 7 | S(FSZ11)-630–150000/110 | 110kV Three-winding On-load Tap Changer Power Transformer Series | 110kV | 3 Phase |
| 8 | S(FS11)-630–100000/110 | 110kV Three-winding Off-load Tap Changer Power Transformer Series | 110kV | 3 Phase |
| 9 | SFZ11-630–150000/110 | 110kV Double-winding Transformer with 35kV Tertiary Winding | 110kV | 3 Phase |
| 10 | S(FZ11)-12500–250000/220 | 220kV Double-winding On-load Tap Changer Power Transformer Series | 220kV | 3 Phase |
| 11 | S(FP11)-31500–420000/220 | 220kV Double-winding Off-load Tap Changer Power Transformer Series | 220kV | 3 Phase |
| 12 | S(FSZ11)-31500–240000/220 | 220kV Three-winding On-load Tap Changer Power Transformer Series | 220kV | 3 Phase |
| 13 | S(FS11)-31500–300000/220 | 220kV Three-winding Off-load Tap Changer Power Transformer Series | 220kV | 3 Phase |
| 14 | OS(F)SZ-50000–250000/220 | 220kV Three-phase Auto-transformer (On-load Tap Changer) Series | 220kV | 3 Phase |
| 15 | OS(F)S-31500–240000/220 | 220kV Three-phase Auto-transformer (Off-load Tap Changer) Series | 220kV | 3 Phase |
| 16 | S(FSZ11)-H-63000–180000/220 | 220kV On-load Tap Changer Combined Transformer Series | 220kV | 3 Phase |
| 17 | OSFSZ-240000/330 | 330kV Three-phase On-load Tap Changer Power Transformer Series | 330kV | 3 Phase |
| 18 | ODFS-334000/500 | 500kV Single-phase Off-load Tap Changer Power Transformer Series | 500kV | Single Phase |
Need the Right Power Transformer for Your Project?
From standard utility transformers to customised high-voltage and special application solutions, we support project requirements with dependable design, export-ready execution and technical consultation.